Drum-controller.



H. J. WIEGAND. DRUM CONTROLLER. APPLICATION FILED 'HAB.14, 1907.

Y/iL V/Z/W? Patented Nov. 24, 1908.

7 SHEETS-SHEET 2.

ZZ Z3 H. J. WIBGAND. DRUM CONTROLLER. APPLICATION FILED MAR. 14, 1907.

Patented Nov. 24, 1908.

7 SHEETSSHEET '3.

H. J. WIEGAND. DRUM CONTROLLER. APPLIOATIQN FILED MAR.14, 1907.

Patented Nov. 24, 1908.

'I SHEETS-SHEET 4.

H. J. WIEGAND. DRUM CONTROLLER.

I APPLICATION FILED MAR.14, 1907. v v 904,906. Patented Nov. 24. 19084 Patented Nov. 24, 1908. 7 SHEETS-SHEET 6.

Mill

' H. J. WIEGAND.

DRUM CONTROLLER. APPLIOATIQN FILED MAR.14, 1907.

Patented Nov. 24, 1908 7 SHEETS-SHEET 7' UNITED STATES PATENT OFFICE.

HENRY .l. WIECAND, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO THE CUTLER-HAMMER MANUFACTURING COMPANY, OF B'IILWAUKEE, WISCONSIN, A CORPORATION OF WIS- CONSIN.

DRUM-CONTROLLER.

Specification of Letters Patent.

Patented Nov. 24', 1908.

To all whom it may concern:

Be t known thatI, HENRY J. \VIEGAND, a citizen of the United States, residing at Mil- 'waukee, in the county of Milwaukee and had to the accompanying drawings, forming 10 a part of this specification.

My invention relates to improvements in electrical switches and is particularly applicable to motor controllers.

One of the objects of my invention is to provide a controller in which means are provided for mechanically operating a series of switches in a definite sequence.

The controller which my invention provides is especially adapted for use -in circuits carrying. heavy currents.

In order to explain the nature of my invention, I shall describe one form thereof which is illustrated in the accompanylng drawings.

as follows:

Figure tie a front elevation with the easing removed, Fig. 2 is a side elevation show- The figures in the drawings are mg CilSll'lgYlIl sectioinFig. 3 is a section on the 'line 33 of Fig. 1, Fig. 4 is a section on 1 line 44, Fig. 1, Fig. 5 is a section on line 5'5, Fig. 1, Fig. 6, is a side elevation of the contact part of the "controller. Fig. 7 is a plan view of my device, Fig. 8 is an elevation showing the reverse side of the drum to' that shown in Fig. 1, Fig. 9 is a detailed. section of the drum Fig. 10 is a perspective detail of the drum, Fig. 11 is a perspective view of one of the protecting casings for theswitch'contacts, and Fig. 12 1s a diagrannnatic new of the circuit arrangement of my controller.

In the embodiment of my invention illustrated in the accompanying drawings, Iproride for iuclosing the various parts of the controller, a casing, which is preferably made in two parts only, vthe back, top and bottom forming one part, and the front and sidesforming the second part. These two sections coincide to form an inclosing casing which completely protects the various parts of the controller.

Vertically mounted within the casing in suitable bearings and 3 is a shaft 4. which ler. The drum is preferably supported on the shaft by means' of upper and lower brackets 7 secured upon the shaft by collars 8 and pins 5) which extend through the collars and the shaft. The arms ID of the brackets are secured to the drum by bolts 11 which pass through said arms and flanges 12 formed on the ends of the drum. Suitable insulating disks 13 are interposed between the brackets and the ends of the drum, as well as insulating disks 14 between the bolts and the brackets, to properly insulate the drum from the shaftand other parts of the controller. V

The drum 5 has formed thereon at suitable. intervals operating cam's which are arranged to actuate various switches of the controller, to be hereinafter more fully described. These'cams'are illustrated as being formed integrally with the drum but it will be understood that they may be secured upon the drum in any desired manner or that any other suitable actuating means may be used in place of the cams. The cams 16, 17, 18, and 19 at the upper end of the drum are longer than the other cams, and are arranged to operate thereversing switches of the controller. The remaining camsEZO are arranged to properly operate the resistance controlling switches of the controller.

The drum may be rotated in'any desired manner but for the purpose of illustration, I have shown the same as being manually rotated by a handle 21 mounted on the shaft 4. The handle is provided with a mechanism for locking it in the off position, consisting of a push button 22 and a pivoted spring pressed pawl 23 one end of which is arranged to engage between a pair of stops 24 formed on the top of the casing. A stop mechanism for holding the drum in any position to which it may be rotated is provided and comprises a star wheel 25 mounted on the shaft l and a spring controlled lever 25 having at its engaging end a roller 26 which engages the star Wheel.

The switches 27 of the controller operated by the cams on the drum are arranged upon upon bases 28 secured by means of suitable bolts to supporting arms Qt extendmg forwardly frormtheback' of the controller cascarries the operating drum 5 of the control-.

either side of the drum and are mounted as ai lug. 'lhese bases are preferably made of wood, but itwill be understood that any i her suitable material may be provided and :ni their forward ends are provided with angle irons which prevent the bases from. splitting and protect the edges of the wood. The forward or free ends of the arms 29 are spaced apart and held against defied carries a main contact 35, an auxiliary contact 36 and an arcing Contact 37. he main contact is flexible so that when it engages the stationary contact 38, also mounted upon the base 28, it will rub over the same. It is preferably made of laminations or leaves of copper which are secured in a cup 39 mounted upon the arm 32' The auxiliary contact 36 is preferably mounted upon one end of a flexible orspring arm secured at its. opposite end "to the arm 32 and the arcing contact 37 is preferably pivoted upon one end of a spring arm 41, also having its opposite end secured to the arm 32.

The various contacts are electrically connected with a bindingpost upon the opposite side of the base by a curved'metallic,

arni 42 which has one end secured to the cup 39 and the opposite end secured in position upon the base by the bolt 43 which extends through the base and forms at its opposite end a binding post. The arcing contact 37 is pref.- erably connected to the arm 32 by,a braided or flexible conductor-44 which carries the current instead of the spring-arm 41 Whereby the temper of the arm 41 will not be affected. The roller 34 on the end of-the arm 32 is held against the face of the drum by a coiled spring extending between the arm 32 and the arm &2.

The stationary contact 38 comprises a plate 46 secured upon the base and having at its outer end a carbon contact 47, secured in a socket formed in the plate, by bolt or pin 48. One of the bolts which secures the plate 38 in. position extends through the base to form a binding post 49 upon the opposite side thereof. The contact plate is protected by an inclosing casing 50 suitably lined with insulating material. In operation the contacts of the switch arm engage and disengage the contact plate in the order in which they have been named, that is, first the main contact, then the auxiliary contact, and finally the arcing contact.

in addition to the reversing switches and scribed.

ceases porting block 57, is one arm 58 'of a bell crank lever. A roller 59 carried at the outer end of the arm engages the disk 53. The other member 60 of the bell crank lever. carries a main contact 61, an auxiliary contact 62, and an arcing contact 63. These contacts are constructed substantially as the contacts of the switches heretofore described, and it will, therefore, 'be' unnecessary, to more fully describe the same. They are connected with the. binding post 64 by means of a suitable conductor 65 whereby they may be suitably connected in circuit. A coiled spring 66 inter osed between the arm 58 of the bell crank ever and the supporting base 57, maintains the roller 59in engagement with the disk 53 and the switch. in theopen position. .The contact late 67 is provided with an offset 68 by which .it is secured to the base 57 and is of substantially the same construction as heretofore de- A. blowout magnet'for extinguishing the are betweenthe carbon contact of the contact plate 67 and the arcing contact 63 is also mounted upon the base 57. It is pref-, erably provided'with pole pieces 68 which are attached to the base 57, andghave ar ranged between the same a blowout coil 69, one terminal of which is connected with the main line binding post 70, by the conducting arm 71, while the other terminal thereof is connected with the contact plate 67. The pole pieces are providedwith polar extensions'72 between whichsets an insulating .110 barrier or chute 73 in which is arranged the contact plate 67. The insulating barrier is preferably made of. insulating plates or disks 74 which are attached'to-a block 7 5 by bolts 76 or any other securing means. 1'15 Tl1e various. switches are arranged to be closed by the rotation of the drum in their propel sequence as follows: Upon moving the controller handle in a clockwise'direction the main line switch is closed and one set of reversing switches are oioscd in such a manner that the circuit ill passthrough the motor to operate the same in a forward direction." A continued movement-of the handle closes the resistance contro ling switches in a definite sequence to cut the, re-. sistance out of the motor ci cuit s ctio i by section. A movement of the hufi dl counter-clockwise direction will '01 the main lineswitch and the opposite set of re- 13o l that the operation of my invention may be In the diagrammatic View of the circuit arrangement. shown in Fig. 12, the switches arranged on one, side of the drum, in order more fully described, will be numbered 27 27 for switches controlling the direction of operation of the motor, and 27, 27, 27 27 and 2' for the resistance controlling switches. The switches upon the opposite side of the controller will be numbered 27 27" for the switches controlling the direction of operation of the motor, and 27 to 27 for the resistance controlling-switches.

In operation, assuming that the controller is in the 01f position, to start the motor, the handle of the controller is moved in a clockwise direction. This will cause the disk 53 to close the main line switch 51 and the'cams 16 and 17 to close the reversing switches 27 and 27 With these switches closed, the circuit will be as follows: from the main line 77, through the winding 78 of the blow-out magnet, across the main line switch 51, through the field winding 79 of the motor, through all of the resistance 80, across reversing switch 27 by conductor 81, through-the armature 82 of the motor, by conductors 83 and 84 across reversing switch 27 through all of the resistance 85, by conductor 86 back to the opposite side 87 of the main line. A continued movement ofthe' handle will cause the cams on the drum to close switch 27 to cut out the first section of resistance, then switch 27 to cut out another section of resistance, and so on until all of the resistance has been cutout of the motor circuit.

- Assuming now that the controller is again in the off position, a counter clockwise movement of the controller handle will cause the cams'19 and 20 to close the reversing switches 27* and 27 and at the same time, the disk 53 to close the main line switch 51. The. circuit will now be closed through the motor in an opposite direct-ion and the motor will run in a reverse direction. A continued movementof the controller handle in a counterclockwise direction will close the resistance controlling switches to cut out, as heretofore described, the various sections of resistance.

WVhile I have shown and described a specific form of my invention, it will be understood that I do not intend to be limited to the structure so illustrated and described, but may make various modifications and changes therein without departing from the spirit of my invention, as set forth in the appended claims.

Having thus described my invention what I claim and desire to secure by Letters latent of the United States is- I. In a controller. the combination with a plurality of reversing switches, of a plurality of resistance switches, and a single rotatable member prov-"idedwith cams for actuating said resistance switches and a part of said reversing switches when said member is rotated in either direction.

2. In a controller, the combination with a plurality of reversing switches, of a plurality of resistance switches, a main line switch, and a single movable member provided with means for actuating said resistance switches. said main line switch and certain of said reversing switches when said member is moved n either dlrection.

8. In a controller, the combination with a plurality of reversing switches, of a plurality of resistance switches, a main line switch, a rotatable shaft, aplurality of cams carried thereby for actuating said resistance switches, said main line switch and certain of said reversing switches when said shaft is moved in either direction, and a blow-out for said main line switch.

4. In a controller, the combination with a plurality of reversing switches, of oppositely disposed sets of resistance switches, a main line switch and a single movable member mounted between said sets of resistance switches and provided with cams for actuating all of said resistance switches, said main line switch and certain of said reversing switches when said member is moved in either direction.

5. In a drum controller, the combination with a pair of supporting bases, of a set of reversing contacts and a set of resistance contacts carried by each of said bases. a set of reversing switches and a set of resistance switches carried by each of said bases and adapted to cooperate with said contacts, a drum mounted between said bases and pro vided with a. plurality of cams for actuating all of said resistance switches and certain of said reversing switches when said drum is moved ineither direction.

' 6. In a drum controller," the combination with a. pair of supporting bases, of a set of reversing contacts and a set of resistance contacts carried by each of said bases, a set of reversing switches and a set of resistance switches carried by each of said bases and adapted to cooperate with said contacts, a. shaft rotatably mount-ed between said bases, a drum mounted on said shaft and insulated therefrom, said drum being provided with a plurality of cams for actuating all of said resistance switches and certain of said re---= .versing switches when moved in. either direcrot tion, a main line switch, and a cam carried by said shaft for operating said main line.

motor, of a series of oppositely disposed re-V sistance controlling switches, a main lme.

switch, and a rotatable fnember having actuating means for operating said, switches 1n a definite sequence.

18. The combination with a casing of supporting bases arranged therein, a plurality of switches mounted upon said bases, a main line switch-arranged within said casing, a member rotatably mounted within said casing between said bases having actuating means for operating said first mentioned swltches and actuating means for operating said mam line switch.

9. In a controller, the combination with magnet for said main-line switch.

' In witness whereof, I have hereunto subscribed my name in, the presence of two witnesses.

HENRY J. WIEGAND, Witnesses.

W. 1\I. HELZ, T. E. BARNUM. 

